Multiple Choice Questions on In a History examination the average for the entire class was 80 marks If 10 of the students scored ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

In a History examination the average for the entire class was 80 marks If 10 of the students scored ...........

Quantitative Aptitude ( CCS) Percentage
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    In a History examination, the average for the entire class was 80 marks. If 10% of the students scored 95 marks and 20% scored 90 marks, what was the average marks of the remaining students of the class ?

    25

    Incorrect Answer

    50

    Incorrect Answer

    75

    Correct Answer

    100

    Incorrect Answer
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    Explanation:

    Let the number of students in the class be 100 and let this required average be x.

    Then, (10 * 95) + (20 * 90) + (70 * x) = (100 * 80)

    = 70x = 8000 - (950 + 1800) = 5250

    = x = 75.

    Hence, option 3 is the correct answer.

    By: Amit Kumar
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